From 624980b98d7741f9af0cfb417336d149bb21e704 Mon Sep 17 00:00:00 2001
From: Jon Siwek <jsiwek@ncsa.illinois.edu>
Date: Fri, 18 Jan 2013 12:56:23 -0600
Subject: [PATCH] Add a null value check in CompositeHash::ComputeHash.

Because I guess aborting is nicer than segfaulting.

Addresses #930.
---
 src/CompHash.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/CompHash.cc b/src/CompHash.cc
index 86677f9719..306b3ea83e 100644
--- a/src/CompHash.cc
+++ b/src/CompHash.cc
@@ -273,6 +273,9 @@ char* CompositeHash::SingleValHash(int type_check, char* kp0,
 
 HashKey* CompositeHash::ComputeHash(const Val* v, int type_check) const
 	{
+	if ( ! v )
+		reporter->InternalError("null value given to CompositeHash::ComputeHash");
+
 	if ( is_singleton )
 		return ComputeSingletonHash(v, type_check);